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Motorola NVG589 VDSL2 Gateway

ATT Internet users in Bay area use Motorola  ARRIS NVG589 Gateway.

The device can also used for VOIP.

My parents in law have this device since last month.

The Admin interface is http://192.168.1.254

Access code is printed on the device label.

 

I found three guides online. Saved here for future referenc.

Motorola NVG589 VDSL2 Gateway

ATTWi-FiGatewayReplacementSelf-InstallGuide-ATT1235208539

Wireless-gateway-replacement-ATT130950864-2

D-Link DWA-192 AC1900 Wi-Fi Dual Band USB Adapter

Because I have a new router Dir-880L, a new Wi-Fi adapter is required.

D-Link DWA-192 AC1900 Wi-Fi Dual Band USB Adapter。 Regular price is  more than $80 at the retail store. Now I got a new one from London Drugs. It is on sale. $49.99 plus tax. I saw this price before at the same store.

USB 3.0 connection to PC or Laptop. It provides 802.11b, 802.11a, 802.11g, 802.11n, 802.11ac.

   dwa-192-box-1

dwa-192-box-2

dwa-192-box-4

Next Generation Wireless Technology – Wireless AC1900 for seamless gaming, smooth HD media streaming and fast file transfers

Dual Band Performance – Up to 600Mbps (2.4GHz) or 1300Mbps (5GHz) to deliver fast wireless speeds and less interference for maximum throughput

USB 3.0 – Faster connectivity and performance

Simple setup – WPS Push Button for easy connection to your wireless network

Backward compatibility – Compatible with existing Wi-Fi routers and range extenders

 

Continue reading “D-Link DWA-192 AC1900 Wi-Fi Dual Band USB Adapter”

Wifi Standard 802.11ac

802.11ac is main stream as well as 802.11n.

Because 802.11n has better distance and more power to pass-through wall. But 802.11ac is much fast than 802.11n.

802.11ac Technology Overview:

11n Specification:

  • 2.4 and 5Ghz  Supported
  • Wider channels 40MHz
  • Better modulation 64QAM
  • Additional streams up to 4 streams
  • Beam forming
  • Backwards compatibility, with 11a/b/g

11ac introduces:

  • 5GHz supported
  • Even wider channels 80Mhz and 160 Mhz
  • Better modulation 256 QAM
  • Additional streams up to 8
  • Beam forming
  • Backwards compatibility with 11a/b/g/n

Wider Channels:

80MHz channels is 4.5x faster than 20MHz

 

Now 802.11ac v2 is comming. Also called wave 2. It is expected to be available in 2015.

Here is some highlights of wave 2 802.11ac.

MU-MIMO

  • Use AP MIMO resources more effectively
  • Transmit data to multiple devices simultaneously.

4×4:4SS

  • Benefit of additional stream mostly for MU-MIMO
  • Not anticipating any 4×4:4SS client devices
  • Adds 33% to max datarate

VHT160

  • Double s max datarate
  • Practical problem: only 2 VHT160 channels in entire 5GHz band

Continue reading “Wifi Standard 802.11ac”

Wifi 5Ghz connection improvement on Android 4.4.3

wifi 5G band, on Android 4.4.3 Nexus 7

One of the biggest improvement on Android 4.4.3 release is Wifi connection.

Especially at 5G band. My router is located in living room.

When my Nexus 7 connected with Wifi 5G in the same room, the signal strength is very good. The problem is when I move to the room with two walls distance, connection lost.

It is no problem when it is working on the 2.4G band.

After this Android 4.4.3 upgrade. The problem solved.

wifi 5G band, on Android 4.4.3 Nexus 7

See, the signal icon is full.

 

If your Nexus 7 has same problem as mine, go to upgrade to Android 4.4.3.

7 Tips to Wi-Fi Performance Optimization

The seven must-know tips for your Wireless Wi-Fi network Performance Optimization.

1. Placements of Devices

Radio signal travels through air to its destination. The radio signal will be reflected, refracted or absorbed if there is something on the way.

So, Keep the wireless router away from blockage, especially metal and bricks.

2. Antennas Positioning

Antennas has direction.  So try to put the antenna in multiple directions to avoid the generation of dead zone.  The D-Link SmartBeam provides much better directions.

3. Handling Radio Interference

As I discussed before, choose the least used wireless channel when possible.

4. Maximizing Channel Bandwidth

Later generations of wireless protocol may utilize higher bandwidth to deliver the superior performance from the previous. So choose 40MHz instead of regular 20MHz, it provides double bandwidth for your connection if possible with the wifi adapter.

5. Encryption

For security reasons, data encryption is must have. There are two main different encryption methods, or Cipher Type. TKIP and AES. TKIP has poor performance. So, select the AES for your network.

6. Other Unique Options

Some unique options may available for certain router and wireless adapters. Most are from same brand. Such as TX Bursting, Optimize AMPDU, Optimize ack suppression or Jumbo Pack.  But do it cautiously,  it may break the connection if the device is not compatible.

7. Further Extend the Wireless Coverage

To further extend the network coverage, one can also consider put a Wi-Fi repeater. I setup my WIRELESS-N WZR-HP-G300NH2 as repeater with DD-WRT rom.

Continue reading “7 Tips to Wi-Fi Performance Optimization”

How to choose the right channel for your WIFI

There are a lot of things may affect the connection speed of you WIFI. The connection speed between router or AP to your PC or laptop.

One of the most important fact is the channel.

For 2.4GHz, there are 13 channel. 20MHz each channel
1 : 2412MHz
2 : 2417MHz
3 : 2422MHz
4 : 2427MHz
5 : 2432MHz
6 : 2437MHz
7 : 2442MHz
8 : 2447MHz
9 : 2452MHz
10 : 2457MHz
11 : 2462MHz
12 : 2467MHz
13 : 2472MHz
14 : 2477MHz

If choose channel 3, it will cover from 2412MHz to 2432MHz.

One of the best tools to find the right channel is inSSider.
inssider-network

Continue reading “How to choose the right channel for your WIFI”

AE2500 vs DWA-525 vs WUA 1340

Three network card or USB adapter.

The oldest one is WUA1340, I got five years ago. DWA-525 just weeks ago. The LinksysAE2500 I got this week.

WUA1340 is G only. DWA-525 and AE2500 support 802.11n network. Based on the theory, DWA-525 is 3 times faster than WUA1340, AE2500 is 2 times faster than DWA525. But, the reality may be different. Let me show you the fact based on my personal test of the speed to copy a large file.

Linksys AE2500
AE2500,0

  • Wireless Dual-Band N (2.4 or 5 GHz)
  • High speed up to 300 Mbps
  • Optimized for streaming video & gaming

Dlink DWA-525
DWA 525 Front

  • Wireless N
  • 150 Mbps 2.4 GHz
  • PCI

Dlink WUA-1340

dlink-wua-1340-wifi

  • Wireless G
  • 54 Mbps
  • Hi-Speed USB

Continue reading “AE2500 vs DWA-525 vs WUA 1340”

How to choose the right router

To choose the router or upgrade your home network, first you should know what standard you need.
There are three main standards on market now.
Standard Max Speed
802.11g 54Mbps
802.11n 600Mbps
802.11ac 1.3Gbps
802.11g was introduced many years ago, I wrote a post eight years ago related the wireless network.
802.11ac is still a draft standard. It means most products from different company are not same. They may not work together compatibly. The good news is that IEEE will issue the final approved version of 802.11ac the end of this year 2013. Here is the timeline.
The Max Speed described above is in theory. When the router working inside the house, walls, furniture, these kind of obstacles reduce the speed by 50%.
There are also frequence, bandwidth, channel issue for your router.
for 802.11g, 2.4GHz, there are 13 channel. 20MHz each channel
for 802.11n, 2.4GHz or 5GHz, 20MHz each channel, bonding channels.
for 802.11ac, 5GHz,
Bonding channels is double the bandwidth, or 40Mhz. It means faster.

Continue reading “How to choose the right router”

Update Kobo Mini firmware

The old firmware on this Kobo Mini is 2.1.5. Today I did an update, it is 2.4.0 now.
Here is the guide to make update.
1) Make sure you’re within range of an available Wi Fi network, and that your eReader’s battery is fully charged. You must stay within range of this network while your eReader updates.
2) From the Home page, tap the Menu icon.
3) Tap the Sync button.
4) Your eReader will connect to the network and will inform you of an available software update.

kobomini-update-1

5) You will be asked to agree to the update.
6) When finished the update, the eReader will inform you and restart. Once it is powered up, you will see the list of What’s New.
Here is the release notes I received.

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Disable your WiFi WPS, security vulnerability found

It is a big news yesterday.
WiFi WPS security vulnerability found, major router makers affected
Wi-Fi Protected Setup (WPS; originally Wi-Fi Simple Config) is a computing standard that attempts to allow easy establishment of a secure wireless home network, but has been shown to easily fall to brute-force attacks. vi wiki
The router affected including:
Belkin, Inc.
Buffalo Inc.
D-Link Systems, Inc.
Linksys
Netgear, Inc.
Technicolor
TP-Link
ZyXEL
So, disable your WiFi WPS first.

How to Disabling WPS on Belkin router

1. Open a web browser on the computer.
2. In the address bar of the web browser, type http://192.168.2.1
3. Click Login in the upper right-hand corner of the page. The router does not ship with a password, so just click Submit.
4. Click on Wi-Fi Protected Setup or WPS (depending on which router you own) under Wireless in the menu on the left.
5. Click on the drop-down menu at the top of the page and select Disabled.
6. Click the “Apply Changes” button.

Continue reading “Disable your WiFi WPS, security vulnerability found”

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